Harley Davidson Sportster Models 2009. Service Repair Manual — page 49
4.16
DTC P0107, P0108, P0112, P0113
GENERAL
. The Temperature Manifold Absolute Pressure
(TMAP) sensor provides the functions of both an Intake Air
Temperature (IAT) sensor and a Manifold Absolute Pressure
(MAP) sensor in one unit.
The TMAP sensor is supplied 5 volts from ECM terminal "14"
and sends IAT and MAP signals back to ECM terminals "7"
and "25" respectively.
MAP Signal
The MAP signal varies in accordance with engine vacuum and
atmospheric barometric pressure. Changes in barometric
pressure are influenced by weather and altitude.
IAT Signal
The IAT portion of the TMAP sensor is a thermistor device,
meaning that at a specific temperature, it will have a specific
resistance across its terminals. As this resistance varies, so
does the voltage on terminal "7" of the ECM.
•
At high temperatures, the resistance of the IAT sensor is
very low, which effectively lowers the signal voltage on
terminal "7".
•
At low temperatures, the resistance is very high, allowing
the voltage to rise close to 5 volts.
The ECM monitors this voltage to compensate for various
operating conditions.
Table 4-20. Code Description
DESCRIPTION
DTC
MAP sensor open/low
P0107
MAP sensor high
P0108
IAT sensor voltage low
P0112
IAT sensor open/high
P0113
ed02852
Figure 4-32. TMAP Sensor (Typical)
DIAGNOSTICS
TOOL NAME
PART NUMBER
VACUUM PUMP
HD-23738
HARNESS CONNECTOR TEST KIT
HD-41404-B
BREAKOUT BOX
HD-43876
Diagnostic Tips: MAP Sensor
•
DTC P0107 or P0108 will set if the MAP sensor signal is
out of range. DTC P0108 can only be detected with the
engine running.
•
MAP sensor output check. Using the VACUUM
PUMP (Part No. HD-23738), apply a vacuum to the pres-
sure port of the TMAP sensor. The MAP signal voltage
should lower as the vacuum is applied.
•
The TMAP, Jiffy Stand, and TP sensors are connected to
the same reference line (+5V Vref). If the reference line
goes to ground or open, multiple codes will be set (DTC
P0107, P0108, P0122, P0123).
Diagnostic Notes: MAP Sensor
Each reference number below correlates to a circled number
on the flowchart(s).
1.
Connect BREAKOUT BOX (Part No. HD-43876) between
wire harness and ECM. See
2.
Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), gray pin probes and patch cords.
4-66 2009 Sportster Diagnostics: Engine Management
Diagnostic Tips: IAT Sensor
Check the following conditions:
•
Poor connection: Inspect ECM and harness connector
[78] for backed out terminals, improper mating, inoperative
locks, improperly formed or damaged terminals, poor ter-
minal- to-wire connection and damaged harness.
•
Perform
connections and harness check out OK, use a DVOM to
check the IAT sensor voltage reading while moving related
connectors and wiring harness. If the failure is induced,
the IAT sensor voltage reading will change.
•
Shifted sensor: Refer to
. This table may be
used to test the intake air temperature sensor at various
temperature levels in order to evaluate the possibility of a
shifted (out-of-calibration) sensor which may result in
driveability problems.
•
An intermittent may be caused by a poor connection,
rubbed through wire insulation or an inoperative wire inside
the insulation.
NOTE
All voltage and resistance values are approximate (20%).
Measure IAT sensor resistance between ECM terminal 7 and
system ground (ECM terminal 26).
Table 4-21. Bosch TMAP Air Temp
DEG F
VOLTs
OHMS
DEG C
-4
4.7
15614
-20
14
4.5
9426
-10
32
4.3
5887
0
50
4.0
3791
10
68
3.6
2511
20
77
3.4
2063
25
86
3.2
1715
30
104
2.7
1200
40
122
2.3
851
50
140
1.9
612
60
158
1.5
446
70
176
1.2
329.5
80
194
1.0
246.2
90
212
0.8
186
100
Diagnostic Notes: IAT Sensor
Each reference number below correlates to a circled number
on the flowchart(s).
1.
Connect BREAKOUT BOX (Part No. HD-43876) to EFI
wire harness only (leave ECM disconnected). See
.
2.
Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), gray pin probes and patch cords.
3.
Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), gray socket probes and patch cords.
4.
Replace TMAP sensor. See the service manual.
2009 Sportster Diagnostics: Engine Management 4-67
To TP Sensor
ECM
To TP Sensor
TMAP
Sensor
IA
T
5V
Sensor
P
o
w
er
MAP
Imput
5V
Sensor
Ground
V/W
R/W
R/W
R/W
V/W
LGN/Y
LGN/Y
BK/W
V/W
R/W
LGN/Y
BK/W
V/W
R/W
LGN/Y
BK/W
BK/W
BK/W
BK/R
BK/W
To ET and O2 Sensors
To Jiffy Stand Sensor
R/W
To VSS
3
14
5
11
3
14
5
11
1
2
3
4
1
2
3
4
14
25
26
7
14
25
26
7
[145B]
[145A]
[78A]
[78B]
[80A]
[80A]
em01206
Figure 4-33. TMAP Sensor Circuit
Table 4-22. Wire Harness Connectors
LOCATION
TYPE
DESCRIPTION
NO.
Under seat
36-place Packard
ECM
[78]
Top of induction module (XL), Side of
induction module (XR)
4-place Packard
TMAP sensor
[80]
Under seat
16-place Molex
Engine Harness
[145]
4-68 2009 Sportster Diagnostics: Engine Management
DTCs P0107 and P0108 (Part 1 of 2)
Connect Breakout Box. With
ignition ON, measure voltage
between terminal 25 and
terminal 26 on Breakout Box.
With key ON, engine OFF, voltage
must be between 3.5 and 5.0 volts.
With key ON, engine running,
voltage must be between 1.5-3.0
volts at hot idle.
Does voltage fit specifications?
YES
NO
Perform 4.8 WIGGLE TEST
to check for intermittents.
Intermittents present?
YES
Go to DTCs P0107 and P0108
(Part 2 of 2).
Wiggle harness while watching
DVOM.
NO
Replace TMAP sensor. Clear DTCs and
road test.
Did the check engine lamp illuminate and
set DTC P0107 or P0108?
YES
Install original TMAP sensor.
Replace ECM (reprogram,
relearn) and road test again
to verify.
NO
System
now OK.
Clear DTCs using odometer self-diagnostics. See
4.6 ODOMETER SELF-DIAGNOSTICS. Confirm
proper operation with no check engine lamp.
1
fc01974_en
Go to DTCs P0107
and P0108 (Part 2
of 2).
2009 Sportster Diagnostics: Engine Management 4-69
DTCs P0107 and P0108 (Part 2 of 2)
Continued from DTCs P0107 and
P0108 (Part 1 of 2).
Check the 5 volt reference supply at the
TMAP sensor connector [80B]. With
ignition ON, measure voltage between
terminal 3 (R/W) and terminal 1 (BK/W).
Is voltage approximately 5.0 volts?
YES
NO.
Greater
than 6V.
Connect Breakout Box to connector [78B]
leaving ECM disconnected. Check continuity
between TMAP connector [80B] terminal 3
and Breakout Box terminal 14. Then measure
continuity between TMAP connector [80B]
terminal 1 and Breakout Box terminal 26.
Is resistance less than 1 ohm?
NO.
Less
than 4.5V.
Locate short to 12
volts on (R/W)
wire in wire harness.
Repair as necessary.
Connect Breakout Box to connector [78B]
leaving ECM disconnected.
OPEN CHECK:
Measure resistance between TMAP
connector [80B] terminal 4 and Breakout
Box cavity 25.
Is resistance less than 1 ohm?
YES
NO
SHORT CHECK:
Measure resistance
between TMAP connector
terminal 4 and chassis
ground.
Is resistance greater than
1 megohm?
Locate and repair
open on (V/W)
wire.
YES
Replace TMAP sensor.
See service manual.
NO
Locate and repair
grounded (V/W)
wire.
YES
Check resistance between
TMAP connector [80B]
terminal 3 and
Breakout Box terminal 26.
Is resistance greater than
1 megohm?
NO
Repair
open wire.
YES
NO
Replace ECM.
Reprogram and
learn password.
Locate and repair short
between (R/W) and (BK/
W) wires.
Clear DTCs using odometer self-diagnostics. See 4.6 ODOMETER
SELF-DIAGNOSTICS. Confirm proper operation with no check
engine lamp.
2
2
2
2
fc01975_en
4-70 2009 Sportster Diagnostics: Engine Management
DTCs P0112 and P0113 (Part 1 of 2)
Connect Breakout Box to connector [78B]
leaving ECM disconnected. With engine at
room temperature (60-90° F or 16-32° C),
use a DVOM to measure resistance across
terminal 7 and 26 on Breakout Box. If
engine is warm, refer to Table 4-21.
Is resistance between 1.5k ohms and 5.0k
ohms at room temperature?
YES
NO
Connect ECM to Breakout Box.
Perform 4.8 WIGGLE TEST to
check for intermittents.
Are intermittents present?
YES
While wiggling harness, perform
steps marked by BOLD
ASTERISKS under DTCs P0112
and P0113 (Part 2 of 2).
Repair as necessary.
NO
Disconnect TMAP sensor connector [80]. Turn
ignition ON. Using a DVOM, measure the
voltage between ECM terminal 7 (positive)
and terminal 26 (negative) on Breakout Box. Is
voltage approximately 5 volts?
YES
NO. Less than
4.7 volts.
NO
Replace TMAP sensor, clear codes
and road test.
Did check engine lamp illuminate
and set DTC P0112 or P0113?
With TMAP sensor disconnected,
disconnect ECM from Breakout Box.
Measure resistance between
Breakout Box terminal 7 and terminal 10
or 28.
Is resistance less than 1 megohm?
Unplug ECM leaving Breakout Box
connected at vehicle harness.
Measure voltage between
Breakout Box terminal 7 and
terminals 10 or 28.
Is voltage 0 volts?
YES
NO
YES
NO
YES
NO
Install original IAT
sensor, replace ECM,
perform password
learning and road test.
System
OK.
Repair short to
ground on
(LGN/Y) wire.
Replace ECM.
Reprogram
and
learn
password.
Replace
ECM.
Reprogram
and
learn
password.
Examine IAT
signal wire
(LGN/Y) for
short to voltage
and repair.
At some point in the flowchart you may be instructed to jump directly to a the box with the bold
asterisk. Disregard the asterisk (but not the instruction box) if your normal progression through
the chart brings you to this location.
Clear DTCs using odometer self-diagnostics. See 4.6 ODOMETER
SELF-DIAGNOSTICS. Confirm proper operation with no check
engine lamp.
1
1
1
fc01976_en
Go to DTCs P0112 and
P0113 (Part 2 of 2).
2009 Sportster Diagnostics: Engine Management 4-71
DTCs P0112 and P0113 (Part 2 of 2)
Continued from DTCs P0112 and P0113 (Part 1 of 2).
Disconnect TMAP sensor connector [80B] and examine for damage.
Is connector OK?
YES
Repair
connector.
NO
Using a DVOM, measure the resistance between TMAP sensor
connector [80B] terminal 2 and ECM terminal 7 on Breakout Box.
Is resistance less than 1.0 ohm?
YES
Using a DVOM, measure the resistance between TMAP sensor
connector [80B] terminal 1 and ECM terminal 26 on Breakout Box.
Is resistance less than 1.0 ohm?
YES
Using a DVOM, measure the resistance between ECM terminal 7
and terminal 26 on Breakout Box.
Is resistance greater than 1.0 megohm?
YES
Using a DVOM, measure the resistance between ECM terminal 7 on
Breakout Box and ground.
Is resistance greater than 1.0 megohm?
YES
Remove TMAP sensor and measure resistance across the 1 and 2
terminals of the TMAP sensor Directly with sensor at room
temperature (60-90° F or 16-32° C),
Is resistance between 2.0k ohms and 5.0k ohms?
YES
Perform 4.8 WIGGLE TEST on steps marked with a BOLD
ASTERISK above to locate intermittents.
Repair as necessary.
2
2
3
NO
Examine (LGN/Y) wire in harness
for open circuit and repair.
NO
Examine (BK/W) wire in harness
for open circuit and repair.
NO
Examine (LGN/Y) and (BK/W)
wires in harness for short between
these two circuits and repair.
NO
Examine harness
for short to ground
and repair.
NO
Replace
TMAP sensor.
4
At some point in the flowchart you may be
instructed to jump directly to a the box with the
bold asterisk. Disregard the asterisk (but not the
instruction box) if your normal progression
through the chart brings you to this location.
Clear DTCs using odometer self-diagnostics. See
4.6 ODOMETER SELF-DIAGNOSTICS. Confirm
proper operation with no check engine lamp.
fc01977_en
4-72 2009 Sportster Diagnostics: Engine Management
4.17
DTC P0117, P0118
GENERAL
ET Sensor
The ECM supplies and monitors a voltage signal (terminal "6")
to one side of the Engine Temperature (ET) sensor. The other
side of the ET sensor is connected to a common sensor ground
(terminal "26") of the ECM.
. The ET sensor is a thermistor device, which
means that at a specific temperature it will have a specific
resistance across its terminals. As this resistance varies, so
does the voltage (terminal "6").
•
At high temperatures, the resistance of the sensor is very
low, which effectively lowers the signal voltage on terminal
"6".
•
At low temperatures, the resistance is very high, allowing
the voltage to rise close to 5 volts.
The ECM monitors this voltage to compensate for various
operating conditions. The ECM also uses the sensor input as
a reference for determining IAC pintle position.
ed02853
Figure 4-34. Engine Temperature Sensor
Table 4-23. Code Description
DESCRIPTION
DTC
ET sensor voltage low
P0117
ET sensor open/high
P0118
DIAGNOSTICS
TOOL NAME
PART NUMBER
HARNESS CONNECTOR TEST KIT
HD-41404-B
BREAKOUT BOX
HD-43876
Diagnostic Tips
Once the engine is started, the ET voltage should lower steadily
in two stages.
Check the following conditions:
•
Poor connection: Inspect ECM and harness connector
[78] for backed out terminals, improper mating, inoperative
locks, improperly formed or damaged terminals, poor ter-
minal- to-wire connection and damaged harness.
•
Perform
connections and harness check out OK, use a DVOM to
check the engine temperature sensor voltage reading
while moving related connectors and wiring harness. If
the failure is induced, the engine temperature sensor
voltage reading will change.
•
Shifted sensor: Refer to
. This table may be
used to test the engine temperature sensor at various
temperature levels in order to evaluate the possibility of a
shifted (out-of-calibration) sensor which may result in
driveability problems.
•
An intermittent may be caused by a poor connection,
rubbed through wire insulation or an inoperative wire inside
the insulation.
NOTE
All voltage and resistance values are approximate (±20%).
Measure ET sensor resistance between ECM terminal 6 and
system ground (ECM terminal 26).
Table 4-24. ET Sensor Table
TEMP °F
HOT
VOLTAGE
COLD
VOLTAGE
RESIST-
ANCE
TEMP °C
-4
4.9
98936
-20
14
4.8
56102
-10
32
4.5
32957
0
50
4.3
20000
10
68
3.9
12511
20
77
3.6
10000
25
86
3.4
8045
30
104
2.9
5304
40
122
2.4
3577
50
140
1.9
2470
60
158
1.5
1739
70
176
4.0
1.2
1246
80*
194
3.7
0.9
907.7
90*
212
3.4
671.2
100
* Between 80-90 °C the ECM changes scaling. Voltages for
ECT sensor will shift scales in that range. This provides proper
sensor resolution for all temperatures.
Diagnostic Notes
Each reference number below correlates to a circled number
on the flowchart(s).
2009 Sportster Diagnostics: Engine Management 4-73
1.
Connect BREAKOUT BOX (Part No. HD-43876) to EFI
wire harness only (leave ECM disconnected). See
2.
Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), gray pin probes and patch cords.
3.
Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), gray socket probes and patch cords.
4.
Replace ET sensor. See the service manual.
1
6
ET
Sensor
Input
5V
Sensor
Ground
26
6
26
2
1
2
ECM
ET
Sensor
To TP, TMAP Sensors And Jiffy Stand Sensor
PK/Y
BK/W
BK/W
BK/W
PK/Y
[78B]
[78A]
[90A]
[90B]
em01207
Figure 4-35. ET Sensor Circuit
Table 4-25. Wire Harness Connectors
LOCATION
TYPE
DESCRIPTION
NO.
Under seat
36-place Packard
ECM
[78]
Above throttle body, right side
2-place Delphi
ET sensor
[90]
4-74 2009 Sportster Diagnostics: Engine Management
DTCs P0117 and P0118 (Part 1 of 2)
Connect Breakout Box to connector
[78B] leaving ECM disconnected. With
engine at room temperature (60-90° F
or 16-32° C), use a DVOM to measure
resistance across terminals 6 and 26
on Breakout Box. If engine is warm,
refer to Table 4-24.
Is resistance between 8.0k ohms and
20k ohms?
YES
NO
Connect ECM to Breakout Box.
Perform 4.8 WIGGLE TEST to
check for intermittents.
Are intermittents present?
YES
While wiggling harness, perform
steps marked by BOLD
ASTERISKS under DTCs P0117
and P0118 (Part 2 of 2).
Repair as necessary.
NO
Disconnect ET sensor connector
[90]. Turn ignition ON. Using a
DVOM, measure the voltage
between terminal 6 (positive) and
terminal 26 (negative) on Breakout
Box.
Is voltage approximately 5 volts?
YES
NO. Less than
4.7 volts.
NO. Greater than
5.3 volts.
Replace ET sensor, clear DTCs
and road test.
Did check engine lamp illuminate
and set DTC P0117 or P0118?
With ET sensor disconnected,
disconnect ECM connector [78B].
Measure resistance between terminal 6
and terminals 10 or 28.
Is resistance less than 1 megohm?
Unplug ECM leaving Breakout Box
connected at vehicle harness.
Measure voltage between terminal
6 and terminals 10 or 28.
Is voltage 0 volts?
YES
NO
YES
NO
YES
NO
Install original
ET sensor,
replace ECM,
perform
password learning
and road test.
System
OK.
Repair short to
ground on
PK/Y wire.
Replace ECM.
Reprogram
and
learn
password.
Replace ECM.
Reprogram
and
learn
password.
Examine ET signal
wire (PK/Y) for
short to voltage
and repair.
At some point in the flowchart you may be instructed to jump directly to a
the box with the bold asterisk. Disregard the asterisk (but not the instruction
box) if your normal progression through the chart brings you to this location.
Clear DTCs using odometer self-diagnostics. See 4.6
ODOMETER SELF-DIAGNOSTICS. Confirm proper
operation with no check engine lamp.
1
fc01978_en
Go to DTCs P0117 and
P0118 (Part 2 of 2).
2009 Sportster Diagnostics: Engine Management 4-75
DTCs P0117 and P0118 (Part 2 of 2)
Continued from DTCs P0117 and P0118 (Part 2 of 2).
Disconnect ET sensor connector [90B] and examine for damage.
Is connector OK?
YES
Repair
connector.
NO
Using a DVOM, measure the resistance
between ET sensor connector [90B] terminal 1 and
ECM terminal 6 on Breakout Box.
Is resistance less than 1.0 ohm?
YES
Using a DVOM, measure the resistance
between ET sensor connector [90B] terminal 2 and
ECM terminal 26 on Breakout Box.
Is resistance less than 1.0 ohm?
YES
Using a DVOM, measure the resistance between ECM
terminal 6 and terminal 26 on Breakout Box.
Is resistance greater than 1.0 megohm?
YES
Using a DVOM, measure the resistance between ECM
terminal 6 on Breakout Box and ground.
Is resistance greater than 1.0 megohm?
YES
Remove ET sensor and measure resistance across the terminals of the ET
sensor directly. Again, with sensor at room temperature (60-90° F or 16-32° C).
Is resistance between 8.0k ohms and 20k ohms?
YES
Perform 4.8 WIGGLE TEST on steps marked with a
BOLD ASTERISK above to locate intermittents.
Repair as necessary.
2
2
3
NO
Examine (PK/Y) wire in harness
for open circuit and repair.
NO
Examine (BK/W) wire in harness
for open circuit and repair.
NO
Examine (PK/Y) and (BK/W) wires
in harness for short between these
two circuits and repair.
NO
Examine harness
for short to ground
and repair.
NO
Replace
ET sensor.
4
At some point in the flowchart you may be instructed to jump directly to a the box
with the bold asterisk. Disregard the asterisk (but not the instruction box) if your
normal progression through the chart brings you to this location.
Clear DTCs using odometer self-diagnostics. See 4.6
ODOMETER SELF-DIAGNOSTICS. Confirm proper
operation with no check engine lamp.
fc01979_en
4-76 2009 Sportster Diagnostics: Engine Management
4.18
DTC P0122, P0123
GENERAL
TP Sensor
The ECM supplies a 5 Volt signal (terminal 14) to the TP
sensor. The TP sensor sends a signal back to the ECM (ter-
minal 24). The returned signal varies in voltage according to
throttle position.
•
At idle (closed throttle), the signal is typically in the range
of 0.20-0.80 Volts.
•
At wide open throttle, the signal is normally 4.0-4.9 Volts.
A DTC P0122 or P0123 will set if the TP sensor voltage signal
does not fall within the acceptable range.
NOTE
When servicing the TP sensor connector on XR models only,
apply Harley-Davidson Electrical Contact Lubricant to the TP
sensor connector terminals prior to connecting the TP sensor.
Table 4-26. Code Description
DESCRIPTION
DTC
TP sensor open/low
P0122
TP sensor high
P0123
ed02854
Figure 4-36. TP Sensor Location (XL)
ed01768
Figure 4-37. TP Sensor Location (XR)
DIAGNOSTICS
TOOL NAME
PART NUMBER
HARNESS CONNECTOR TEST KIT
HD-41404-B
BREAKOUT BOX
HD-43876
Diagnostic Tips
The DVOM reads throttle position in volts. Voltage should
increase at a steady rate as the throttle is moved from idle to
wide open. A short to ground or open on the (GY/V) or (R/W)
wires also will result in a DTC P0122. A short to ground or open
on the (R/W) wire (+5v REF) sets multiple codes as described
below.
NOTES
The TMAP, Jiffy Stand, and TP sensors are connected to the
same reference line (+5V Vref). If the reference line goes to
ground or open, multiple codes will be set (DTC P0107, P0108,
P0122, P0123, P1501, P1502). Start with the trouble code
having the lowest ranking value.
Check for the following conditions:
•
Poor Connection: Inspect ECM and harness connector
[78B] for backed out terminals, improper mating, inoper-
ative locks, improperly formed or damaged terminals, poor
terminal- to-wire connection and damaged harness.
•
Perform
to locate intermittents: If
connections and harness check out OK, monitor TP sensor
voltage using a DVOM while moving related connectors
2009 Sportster Diagnostics: Engine Management 4-77
and wiring harness. If the failure is induced, the TP sensor
voltage reading will change.
•
TP sensor scaling: Observe the TP sensor voltage display
while opening the throttle with engine stopped and Ignition
Switch ON. Display should vary from closed TP sensor
voltage (when throttle is closed) to greater than 4.0 volts
(when throttle is held wide open). As the throttle is slowly
moved, the voltage should change gradually without spikes
or low voltages being observed.
•
Check TP sensor voltage reading with DVOM. If TP sensor
is equal to or greater than 3.8 volts then the system is in
"clear flood" mode and engine will not start. While spark
is present, fuel is shut off. Problem can be mechanical,
such as stuck throttle cables.
Diagnostic Notes
Each reference number below correlates to a circled number
on the flowchart(s).
1.
Connect a BREAKOUT BOX (Part No. HD-43876) between
EFI wire harness and ECM before measuring voltage. See
. Using a DVOM to measure
voltage, take reading across terminal 24 (positive lead)
and terminal 26 (negative lead) on BREAKOUT BOX (Part
No. HD-43876).
2.
Replace TP sensor. See the service manual.
3.
Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), gray pin probes and patch cords.
R/W
R/W
R/W
R/W
R/W
BK/W
BK/W
BK/W
BK/W
BK/W
BK/W
GY/V
GY/V
GY/V
GY/V
3
5
12
3
5
12
B
A
C
B
A
C
To TMAP Sensor
TP
Sensor
To ET And O2 Sensors
To TMAP Sensor
R/W
To Jiffy Stand Sensor
To VSS
14
5V
Sensor
P
o
w
er
5V
Sensor
Ground
TP
Sensor
Input
26
14
26
24
24
ECM
BK/R
[78B]
[78A]
[145B]
[145A]
[88A]
[88B]
em01208
Figure 4-38. TP Sensor Circuit
4-78 2009 Sportster Diagnostics: Engine Management
Table 4-27. Wire Harness Connectors
LOCATION
TYPE
DESCRIPTION
NO.
Under seat
36-place Packard
ECM
[78]
Behind air cleaner housing
3-place Delphi
TP sensor
[88]
Under seat
16-place Molex
Engine harness
[145]
2009 Sportster Diagnostics: Engine Management 4-79
DTCs P0122 and P0123 (Part 1 of 2)
With ignition key ON, measure TP sensor voltage while gradually opening throttle.
Does voltage increase steadily with no spikes or low voltages from 0.2-0.8 volts at idle (closed
throttle) to 4.0-4.9 volts at wide open throttle?
YES
NO
Voltage is
greater than.
Voltage is lower
than or spikes
observed.
Unplug TP sensor connector [88B]
and measure voltage between
terminal B (+) and terminal A (-)
with ignition ON.
Is reading 4.8-5.0 volts?
YES
NO
Disconnect ECM from Breakout
Box. Check resistance between
ECM terminal 24 on Breakout Box
to chassis ground.
Is resistance greater than 1
megohm?
Measure resistance
between TP sensor
connector [88B]
terminal B to ECM terminal
14 on Breakout Box.
Is resistance less than 1.0
ohm?
NO
Find short to
ground on (GY/V)
signal wire.
YES
Replace
TP sensor.
NO
Repair open
in (R/W) wire.
YES
Repair open
in (BK/W) wire.
Check engine lamp ON
continuously and
DTC P0122 or P0123
the only one set?
YES
Replace ECM.
Reprogram and
learn password.
NO
Perform 4.8 WIGGLE
TEST to check for
intermittents.
Are intermittents present?
NO
Replace TP sensor, clear
codes and road test.
Did check engine lamp
illuminate and set DTC
P0122 or P0123?
YES
While wiggling harness,
Go to DTCs P0122 and
P0123 (Part 2 of 2).
Repair as necessary.
YES
NO
Install original
TP sensor, replace ECM
(reprogram and learn
password) and road test.
System
OK.
1
2
2
Clear DTCs using odometer self-diagnostics. See
4.6 ODOMETER SELF-DIAGNOSTICS. Confirm
proper operation with no check engine lamp.
fc01980_en
Go to DTCs
P0122 and P0123
(Part 2 of 2).
4-80 2009 Sportster Diagnostics: Engine Management
DTCs P0122 and P0123 (Part 2 of 2)
Continued from DTCs P0122 and P0123 (Part 1 of 2).
With ignition key OFF, disconnect ECM connector [78B]. Turn ignition key
ON.
Is voltage greater than 0 volts across terminal 24 and terminal 26 on
Breakout Box?
YES
Repair short
between (GY/V) signal
wire and 12 volts.
NO
Measure resistance between ECM terminal 24
on Breakout Box and TP sensor connector [88B]
terminal C.
Is resistance less than 0.5 ohm?
YES
NO
Measure resistance from TP sensor
connector [88B]
terminal C to terminal B.
Is resistance less than 1.0 megohm?
Repair open
(GY/V)
signal wire.
NO
YES
Repair short
between (R/W)
and (GY/V) signal
wire.
Replace
TP sensor.
3
3
2
Clear DTCs using odometer self-diagnostics. See 4.6
ODOMETER SELF-DIAGNOSTICS. Confirm proper
operation with no check engine lamp.
fc01981_en
2009 Sportster Diagnostics: Engine Management 4-81
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